When the nights get chilly, make sure you're wrapped up snug in the 20 degree synthetic Scandium 20 Sleeping Bag from Marmot. This lightweight mummy bag features a blend of Spirafil synthetic insulation below you, with extremely warm 650 fill down above, to help ward off all the winter chills. Durable outer fabric makes sure that you're protected from the elements, and the hood can be pulled up and over when things get real cold out there. A full length zipper makes it easy to get in and out, as well as making you able to shed some excess heat when the nights get warmer.